I keep hearing the Java people saying the same. But there is (almost) no use for runtime reflection when you have proper compile time features. Of course this

I keep hearing the Java people saying the same. But there is (almost) no use for runtime reflection when you have proper compile time features. Of course this is something one can only find out when using a language with those features. But now I'm curious: What do you concretely need (runtime) reflection for? Maybe it's indeed one of the very rare cases where one would really need runtime reflection.